Fire Protection Systems Inspection Flashcards

An inspector finds that spray-type sprinkler heads in a light hazard office have been painted by the building occupant. What is the correct inspection finding?

Answer: The painted sprinklers must be replaced, not cleaned

Per NFPA 25, painted sprinkler heads must be replaced because paint can alter thermal response, change the spray pattern, or prevent the fusible element from activating properly.

What is the purpose of the inspector's test connection (ITC) on a wet pipe sprinkler system?

Answer: To simulate the flow of one sprinkler head to test alarm devices

The inspector's test connection is an orifice equivalent to one sprinkler that, when opened, simulates a single activated sprinkler to verify alarm devices activate properly.

During inspection of a commercial kitchen hood Ansul R-102 wet chemical system, the inspector finds the nozzle caps are missing. This is a deficiency because:

Answer: Grease can clog nozzle orifices and prevent proper agent distribution

Nozzle caps protect the orifice from grease buildup; clogged nozzles cannot distribute wet chemical agent in the correct pattern to suppress a fire.

A fire inspector reviewing a building's fire alarm system discovers that horn/strobes are spaced 100 feet apart in a corridor. Per NFPA 72, what is the maximum allowable spacing for wall-mounted audible appliances in a corridor?

Answer: 100 feet

NFPA 72 permits wall-mounted audible notification appliances in corridors to be spaced no more than 100 feet apart to ensure adequate sound pressure levels throughout.

An inspector checks a hydraulically designed sprinkler system and finds the hydraulic design information nameplate is missing from the riser. What NFPA 25 requirement does this violate?

Answer: The hydraulic design information nameplate must be attached to the sprinkler riser

NFPA 25 requires that a hydraulic design information nameplate be permanently attached to the riser so inspectors and maintenance personnel can verify the system is not overloaded.

During an annual fire pump test, the inspector records that the pump delivers 150% of rated flow at a pressure below 65% of rated pressure. What does this result indicate?

Answer: The pump is underperforming and may require maintenance or replacement

NFPA 20 requires a fire pump to deliver at least 65% of rated pressure at 150% of rated flow; failing this benchmark indicates the pump cannot meet system demand and needs investigation.

A warehouse converts from storing standard commodities to storing aerosols in cardboard cartons on steel shelving. What fire protection system action is most likely required?

Answer: The building owner must notify the fire inspector and a system redesign may be necessary

Aerosols are a higher hazard commodity that can dramatically increase fire intensity; a change in occupancy hazard requires the owner to notify the AHJ, and the sprinkler system may need to be upgraded to protect the new hazard.